How to repost a pic on Instagram without losing previous likes ?

I see that many of my friends are able to re-post pics on Instagram and all their likes and comments? Every time Ive tried to re-post a picture, my li

I see that many of my friends are able to re-post pics on Instagram and all their likes and comments? Every time I've tried to re-post a picture, my likes and comments are not attached. They always disappear as if it's a brand new picture that I just posted. How are others able to do this and not me?

or:I see that many of my friends are able to re-post pics on Instagram and all their likes and comments? Every time I've tried to re-post a picture, my likes and comments are not attached. They always disappear as if it's a brand new picture that I just posted. How are others able to do this and not me?

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